bug-607243.c

Small Device C Compiler 面向Inter8051

/* bad shift right 12 */

#include <testfwk.h>

typedef unsigned int u16_t; 

struct myhdr { u16_t x; } h, *p; 

#define NTOHS(n) (((((u16_t)(n) & 0xff)) << 8) | (((u16_t)(n) & 0xff00) >> 8)) 
#define IPH_V(hdr) ((u16_t)NTOHS((hdr)->x) >> 12) 

void foo(void) { 
  p = &h; 
  p->x = 0x45; 
  ASSERT(IPH_V(p)==4);
}